“The German authorities have obtained a list of the names of about 22,000 foreigners who have traveled to Syria to fight for the Islamic State, a trove of documents that officials say will help them prosecute fighters who return home and improve their efforts to prevent other Germans from joining the organization.
The Interior Ministry confirmed on Thursday that officials believed the list was authentic but declined to give any details about where it came from or the identities of the people on it. It was also not immediately clear whether the German authorities were sharing the list with the intelligence agencies of their allies, including the United States and Britain.”
Source: Germany Obtains List of 22,000 Foreigners Suspected of Fighting for ISIS – The New York Times